Paleomagnetic directions of the Gauss-Matuyama polarity transition recorded in drift sediments (IODP Site U1314) in the North Atlantic

Masao Ohno, Fumi Murakami, Fumiki Komatsu, Yohan Guyodo, Gary Acton, Toshiya Kanamatsu, Helen F. Evans, Futoshi Nanayama

研究成果: ジャーナルへの寄稿記事

7 引用 (Scopus)

抄録

The geomagnetic field direction during the Gauss-Matuyama (G-M) polarity transition was investigated from a high-accumulation-rate (≥10 cm/kyr) sediment core drilled in the Gardar drift in the North Atlantic at Site U1314 during Expedition 306 of the Integrated Ocean Drilling Program (IODP). A well-defined characteristic remanent magnetization was generally obtained by alternating field demagnetization. The consistency of the results with records from Icelandic lavas confirms that the North Atlantic drift sediments contain a high-fidelity record of the geomagnetic field change. During the G-M transition, the virtual geomagnetic pole (VGP) latitude shows north-south-north-south rebounding, with the three VGP paths falling within different longitudinal bands. Two of the three paths are close to or within the preferred bands in which transitional VGPs are suggested to be longitudinally confined. Three additional loops occur that approach mid-to-low latitudes from the North or South pole regions. In addition, the VGPs show rapid movement (directional jumps) between VGP clusters.

元の言語英語
ジャーナルEarth, Planets and Space
60
発行部数12
出版物ステータス出版済み - 1 1 2008

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virtual geomagnetic pole
drilling
Ocean Drilling Program
polarity
oceans
sediments
poles
geomagnetic field
geomagnetism
sediment
demagnetization
remanent magnetization
accumulation rate
expeditions
sediment core
tropical regions
falling
magnetization

All Science Journal Classification (ASJC) codes

  • Geology
  • Space and Planetary Science

これを引用

Paleomagnetic directions of the Gauss-Matuyama polarity transition recorded in drift sediments (IODP Site U1314) in the North Atlantic. / Ohno, Masao; Murakami, Fumi; Komatsu, Fumiki; Guyodo, Yohan; Acton, Gary; Kanamatsu, Toshiya; Evans, Helen F.; Nanayama, Futoshi.

:: Earth, Planets and Space, 巻 60, 番号 12, 01.01.2008.

研究成果: ジャーナルへの寄稿記事

Ohno, M, Murakami, F, Komatsu, F, Guyodo, Y, Acton, G, Kanamatsu, T, Evans, HF & Nanayama, F 2008, 'Paleomagnetic directions of the Gauss-Matuyama polarity transition recorded in drift sediments (IODP Site U1314) in the North Atlantic', Earth, Planets and Space, 巻. 60, 番号 12.
Ohno, Masao ; Murakami, Fumi ; Komatsu, Fumiki ; Guyodo, Yohan ; Acton, Gary ; Kanamatsu, Toshiya ; Evans, Helen F. ; Nanayama, Futoshi. / Paleomagnetic directions of the Gauss-Matuyama polarity transition recorded in drift sediments (IODP Site U1314) in the North Atlantic. :: Earth, Planets and Space. 2008 ; 巻 60, 番号 12.
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abstract = "The geomagnetic field direction during the Gauss-Matuyama (G-M) polarity transition was investigated from a high-accumulation-rate (≥10 cm/kyr) sediment core drilled in the Gardar drift in the North Atlantic at Site U1314 during Expedition 306 of the Integrated Ocean Drilling Program (IODP). A well-defined characteristic remanent magnetization was generally obtained by alternating field demagnetization. The consistency of the results with records from Icelandic lavas confirms that the North Atlantic drift sediments contain a high-fidelity record of the geomagnetic field change. During the G-M transition, the virtual geomagnetic pole (VGP) latitude shows north-south-north-south rebounding, with the three VGP paths falling within different longitudinal bands. Two of the three paths are close to or within the preferred bands in which transitional VGPs are suggested to be longitudinally confined. Three additional loops occur that approach mid-to-low latitudes from the North or South pole regions. In addition, the VGPs show rapid movement (directional jumps) between VGP clusters.",
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AU - Komatsu, Fumiki

AU - Guyodo, Yohan

AU - Acton, Gary

AU - Kanamatsu, Toshiya

AU - Evans, Helen F.

AU - Nanayama, Futoshi

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